The Homeland Security Department announced this week it is waiving environmental rules in order to tear down about 20 miles of vehicle barrier along the New Mexico border and replace it with a higher wall.

An Arizona State University instructor, known for his work with humanitarian aid groups along the Arizona-Mexico border, was arrested by Border Patrol agents last week on a felony charge of harboring undocumented immigrants.

The Flagstaff City Council will vote Jan. 16 on a resolution against the proposed wall along the U.S.-Mexico border. The resolution would boycott doing business with companies involved in the wall’s construction.

With the vintage fighter plane she would later climb into and fly into Phoenix as her backdrop, Southern Arizona Congresswoman Martha McSally announced Friday morning she is running for Sen. Jeff Flake’s seat.